Apparatus for making threads and the like of artificial silk

ABSTRACT

247,172. Klavik, M. Feb. 9, 1925, [Convention date]. Apparatus for making filaments.-The parts of the spinning apparatus are arranged so that the fi aments extruded from the spinning nozzle 2 into the coagulating bath 5 travel vertically to the godet 1 and then fall vertically into the centre of the centrifugal box 3. The edges of the godet are chamfered off in order that any filaments that may wrap round the godet are more easily removed.

June 8,1926. 1,588,292

' H. BADER APPARATUS FOR MAKING THREADS AND THE LIKE 0F ARTIFICIAL SILK Fiied March 5. 1926 Patented June 8, 1926.

UNITED STATES PATENT. orric z.

HERBERT BADER, or VIENNA, AUSTRIA.

APPARATUS FOR MAKING- THREADS All D THE LIKE OF ARTIFIQIAL SILK.

Application filed March 5, 1926, Serial No. 92,511, and in Czechoslovakia Februaryfi, 1925.

In orderto make a thread of the required quality out of artificial silk, various conditious must be fulfilled between the moment when the viscose issues from'the spinneret and the moment when the filament enters the spinning vessel. In the first place the filament must remain in the precipitant until coagulation has been attained with suflicient thoroughness, because when centrifugal machines are used for winding the filament it is hardly; possible to effect a second fixing without a second immersion. It is true that the length of filament immersed at one time in the precipitant can be extended to almost any desired degree if the filament is conducted over a filament-guide and then brought back again to the drawing roller but this involves two objections, namely that it causes the thread to kink and, moreover, almost the whole of the precipitant which the thread carries with it is scraped off. Both these cirtumstances are very detrimental to the quality of the silk, the first placing too great a mechanical strain upon the still exceedingly delicate filament,

while the second prevents proper coagula-.

tion-and smoothing of the thread owing to there not being a suflicient quantity of precipitant'flowing back along it. I

One or the other of the above-mentioned objections has been overcome in many cases. But the methods in question have hitherto never been employed in their entirety and in combination, which is the only Way of insuring the production of a" suitable filament,

4 and the present invent-ion consists in the construction of an apparatus in such manner as to; fulfill all the abdve-mentioned requirements.

The drawings show a method of constructing the apparatus,

Fig. 1 being a side elevation, and

Fig. 2 a plan view.

An essential feature of the invention is that the filament drawing roller 1 is positioned in such a manner that a downwardlycxtending line tangent to its circumference at one end of its horizontal diameter will be perpendicular, or nearly erpendicula-r, to the outlet orifice of the spmneret 2, while a similar tangent at the opposite end of said diameter will be perpendicular, or nearly so, to the center of the spinning vessel 3.

The advantage of this arrangement is, on

the one hand, that the filament 4 is brought to the drawing roller without kinking and,

at the; same time, that until the filament .reaches the roller precipitating-fluid flows along it continually, because that ortio-n of the fluid which passes back into t e bath from the filament is bound to flow along the latter, whereas in the case of a filament which is drawn out of the bath obliquely, a great proportion of the precipitant is bound to drip ofi' from the thread under gravity and is thus no-longer available for coagulation. Further, the filament running off the drawing roller falls in the present construchave become wound on the roller can easily be stripped off laterally.

I claim as my invention:

1. Apparatus for making threads of artificial $11k; comprising a tank to contain a precipitant, a spinning vessel at one side thereof, a spinneret submerged in the precipitant in said tank with its outlet orifice directed upwardly, and a drawing roller located above the tank and spinning vessel in such a position that a downwardly extending line tangent tothe circumference of the roller at one end of its horizontal diameter will passperpendicularly through the outlet orifice of the spinneret while a similar tangent at the" opposite end of said diameter will pass perpendicularly through the both edges-of its periphery to enable a filament wound thereon to bestripped off laterall from the roller.

ture.

HERBERT'BADER.

In testimony whereof I aflix my signa- I 

